The development of a system to measure simultaneously the current and space charge in a dielectric is described. The results obtained for low density polyethylene samples show that the relationship between space charge accumulation and the time-dependent current is not straightforward. In accord with previous work on space charge limited currents, the transient currents initially decreased, but after a while an increment or peak appeared. Additionally, the generation and extraction of space charge packets caused an impulse-like current peak such as previously observed. By comparing the electric field and current at the anode, it was found that the increment and the peak of the anode current are determined by injected negative carriers reaching the anode rather than the increase of electric field at the anode. It is shown that the dynamical evolution of the current can be divided into three stages similar to transient space charge limited current theory.

中文翻译：

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LDPE 中空间电荷和传导电流的同时演化


描述了同时测量电介质中的电流和空间电荷的系统的开发。低密度聚乙烯样品获得的结果表明，空间电荷积累和随时间变化的电流之间的关系并不简单。根据之前关于空间电荷限制电流的工作，瞬态电流最初下降，但一段时间后出现增量或峰值。此外，空间电荷包的产生和提取引起了先前观察到的脉冲状电流峰值。通过比较阳极处的电场和电流，发现阳极电流的增量和峰值是由到达阳极的注入负载流子决定的，而不是阳极处电场的增加。结果表明，与瞬态空间电荷有限电流理论类似，电流的动态演化可分为三个阶段。